Machine for molding fibrous ware



(No Model.)

2 Sheets-Sheet 1 Patented PebflZ, 1889..

H g N 2 Sheets$heet 2.

(No Model.)

H. GARMIOHAEL.

MACHINE FOR MOLDING FIBROUS WARE.

No. 397,778. Patented Feb. 12, 1889.

WV/AVAIVAVAIV V PETERS, Phnmumo mpl NlTE , STATES PATENT ()rrrcn.

MACHINE FGR MOLDING FIBROUS WARE.

SPECIFICATION forming part of Letters Patent No. 397,778, dated February 12, 1889.

Application filed May 16, 1887. Serial No. 238,327. (No model.)

To all whom it may concern: I

Be it known that I, HENRY CARIVIICHAEL, a citizen of the United States, residing at Malden, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Machines for Molding Fibrous are; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures marked thereon, which form part of this specification.

My invention consists in a machine for making hollow articles from pulp, the details of construction and operation being hereinafter fully set forth in the specification and claims.

In the machine described herein the flexible diaphragm for pressing one side of the article is completely disconnected from the chine or bottom plate, and each is independently actuated, thus enabling the chine or bottom plate to approach the opposed foraminous plate or drainage-foot at the interior of the bottom of the article before the flexible diaphragm is actuated to aid in pressing the side of the article, and, further, when the chine or bottom plate is not connected with the flexible diaphragm, it is possibleto give to the chine or bot-tom plate a greater or less movement, according to the thickness of pulp desired for the bottom of the article or according to the class of pulp being used.

Figure l is a top view of a machine embodying my invention; Fig. 2, a side elevation thereof; Fig. 3, a vertical section of Fig. 1 in the line a, and Fig. 4: an enlarged detail of the mold.

In the machine herein shown, T represents a vessel or cylinder of iron or other suitable material, closed by a bottom, T, and provided with a cover, T both of which in practice are securely fastened to the vessel or cylinder by any suitable means, the said vessel or cylinder having a pulp-port, z, and a pipe, to be described.

Fitted fluid-tight within the vessel or cylinder is a mold, A, shown as a hollow plunger, the interior surface of which, as best shown in Fig. 4, has a reticulated drainage-surface,

o of usual construction, the said surface corresponding in form to the exterior surface of the article to be molded, the mold being channeled, as indicated at a, to thus secure better drainage for the water pressed from the pulp, the water thence passing over the bottom of the mold into the hollow stem A to a suitable discharge-port. (Not shown.)

The mold A is shown as provided with a hollow stem, A extended through one end of the cylinder. When a suflicient quantity of liquid pulp has been admitted, through the port t or otherwise, to the interior of the vessel or cylinder and the pulp-port closed, the mold at such time being in its lowest position and its top below the port If, the said mold is raised by hydraulic or other power admitted at the pipe 6 the mold being raised with great force until the edge a thereof strikes against the end T of the cylinder.

The machine herein shown is provided with a chine or bottom plate, 13, made of perforated metal shaped as shown, at or near its periphery, (see Fig. 3,) to leave a raised edge or chine about the bottom of the article. This chine or bottom plate, B, has connected to it a hollow stem, B, which may serve as adminage-tube to conduct water from the machine at the bottom end of the article being molded. This chine or bottom plate is vertically mow able in the said mold A, co-operating therewith to shape the outer side of the article, and its hollow sleeve 13 is extended loosely through the tube A. inder is removable, and has rigidly securedto it the portion 0- of the mold, which portion with its attached parts I shall hereinafter designate as the former. This portion 0 of the former is shown as composed of a metal core, 0, having connected top and bottom plates, as :2 3, the plate 3 having attached to it a drainagefoot, 0 which in the operation of the machine is directly opposed to the chine or bottom plate, B, and forms the inner side of the bottom of the article to be molded, the said foot being foraminous. The water entering the drainage-foot c is in practice discharged or siphoned out through the tube 0', to be described.

The portion 0 of the former has fitted to it a tube, 0', extended fluid-tight through the end T of the cylinder, and the plates 2 and 3 The head T of the cyl-' have connected to them by suitable means the edges of the flexible diaphmgm D, made of rubber or other flexible material.

The head T of the cylinder T has secured to its inner side the perforated d rainagc-rin g i E by suitable means, as screws e, the said drainage-ring being in communication with I an outlet-pipe, (1, and serving to secure a perfectly-i'm'med top edge for the article of a shape conforn'iing exactly to the surface oi the ring R.

The formativm of such a top edge is new within my experience, it being usual to make an article too large at such points and subseq uently reduce and finish it to size by sawing, sandpapcring, and the like. The said head T is also provided with an inlet, G, having in connection with it a suitable valve for the admission of water or fluid to the interior surface of the flexible diaphragm D, the water or fluid coming against the interior of the said diaphragm through suitable openings, (5, (shown in Plate 2,) ot' the portion C of the former, and in this way I may actuate the diaphragm by water or other fluid under pressure, continuing the pressure until the sides of ,the article are formed, it being understood that the bottom of the article has been previously compacted and shaped be tween the chine or bottom plate and the opposing drainage-foot and been pressed until water ceases to flow therefrom through pipes 13' and c. The article having been molded, the head T is removed, the mold A is retracted, with the chine or bottom plate, 3, and thereafter the said chine or bottom plate may be moved by hydraulic or other force exerted through the tube or stem B to discharge the article.

All the drainage-surfaces should be covered I with fine wire-gauze or similar material.

In practice, the two parts of the mold filled i with pulp having been brought into forming position, the chine or bottom plate will be brought againstthe pulp between it and the drainage-foot copposed to it, and the bottom of the article will be partiallyshaped and compacted before the diaphragm D is acted upper part of the mold which is to gi vc shape to the sides of the article.

llaving described my invention, T claiml. In a machine for making hollow articles from pulp, a vessel or cylinth-a', a t'oraminons mold for forming one side of the article to be shapcd,an indepel'ulcntchine or bottom plat e having a stem, the said plate being movable and forming the exterior of the bottom of the article, a flexible diaphragm disconnech-al from the said chine or bottom plate and adapted to press that side of the article opposite the side formed by the said foraminous mold, and a foraminous plate for forming the interior surface of the bottom of the article, the said parts being in combination, as and for the purpose set forth.

2. In a machine for forming hollow articles from pulp, the combination of the following instrumcntalitics: a vessel or cylinder provided with a pulp-port, a :l'oraminous mold,a former, and a chine or bottom plate adapted to be moved in the said mold and shaped to form on the bottom of the article a raised edge or chine, substantially as described.

3. The combination, with a vessel or c vlinder, a foraminous mold for forming the outer side of the article to be shaped, and an independent bottom plate having a stem made movable in the said former or mold, of a former having a foran'iinous drainage foot or plate to come against the bottom of the article being formed opposite the bottom plate, to operate substantially as described.

4:. The combination, with a vessel or cylinder having a pulp-port, of a mold fitting fluidtight therein and having a hollow stem ex. tended through the head oi the said vessel or cylinder, the latter having an opening for the passage into itof a fluid to actuate the said mold or former, substantially as described.

In testimony whereof I aiiix mysignature in presence of two witnesses.

' upon by the fluid, which moves it toward the i i i l HENRY CARMICHAEL.

lVitnesses:

WM. Rarnoivn BAIRT), H. F. QUINT. 

